Thomas koohka



llNrTED STATES PATENT OFFICE.

THOMAS KocHKA, oE JERSEY crrY, NEW JERSEY.

SHUTTER-WORKER.

SPECIFICATION forming part of Letters Patent No. 542,059, dated July 2, 1895.

4 Application tied Mami. 27,1895. Serin no. 543,314. oro man.)

T0 @ZZ tf1/'tom il? may concern.'

Beit known that I, THOMAS KOCHKA, of Jersey City, New Jersey, have invented an Improved Shutter-Worker, of which the following is a specification.

This invention relates to a shutter-worker for opening and closing blinds and shutters and for holding them at any angle to which they may be opened.

In the accompanying drawings, Figure lis a vertical longitudinal section ofmyirnproved shutter-worker on line l l, Fig. 3. Fig. 2 is a vertical transverse section on line 2 2, Fig. l; Fig. 3, a horizontal section on line 3 3, Fig. l; Fig. 4, a detail of washer h, and Fig. 5 a detail of spindle c.`

The letter A represents a window-frame, and B is the shutter hinged thereto as usual.

To the outer side of frame A there is attached a socket a by means of the screws a. This socket is closed by a cap a2, provided with a lubricating-opening, which is closed by a screwplug a3. The lubricant ilows from this opening into an oil-chamber d4, which connects with the interior of the socket a by a neck a5. From the upper side of the cap 01.2 projects a spindle a6, that forms the pivot for the eye of the hinge-strap b, screwed to the shutter B at t.

Within the socket a is hung a vertical spin die c, the upper end of which is journaled in cap ce2, while its lower end c is squared and projects out of the perforated bottom of socket ct. The end c of the spindle is engaged by the squared perforation ot' an arm d, the free end of which enters behind a hook-shaped plate d', screwed to the bottom rail B of shutter B.

The spindle c, carries within the socket a. two worm-wheels c2 c3, the teeth of which face each other, Fig. 5. These teeth are engaged by the worm e of a horizontal shaft e, that passes transversely through a bore of the frame A and is held against longitudinal displacement by acollar e2, that engages the oilchamber d4. On the inner side of the frame A the squared end of shaft e is engaged by the squared socket f of a crank-handle f'. The socket is surrounded by a cap g, that is screwed to the frame A at g', and holds the handle to the shaft. A slotted washer 7L straddles the shaft e within the cap g, and is prevented from rotating bya projection h', which engages ak corresponding notch of the cap.

ln use, a revolution of the handle f to the right or left will revolve the worm-shaft e, and consequently the spindle c, intergeared therewith. The spindle c will in turn vibrate the arm d to either open or close the shutter. The shutter can at anytime be raised off its hinges without first disconnecting the shutterworker, because theV hook-shaped plate d is not attached to the free end of the armd.

l. The combination of socket ct, and cap a2, having `pintle 0,6, with a hinge strap hung upon said pintle and adapted to be secured to the shutter, and with a worm shaft, a spindle intergeared therewith, and an arm connected to the spindle and adapted to engage the shutter, substantially as specified.'

2. The combination of socket a, having an oil chamber d4, and neck d5, that connects said chamber with the interior of the socket, with a worm shaft having a collar e2, engaging the oil chamber, a spindle intergeared with said shaft, and an arm connected to the spindle and adapted to engage the shutter, substantially as specified.

THOMAS KOGHKA. 

